Safety precautions
This booklet provides safety warnings and precautions for our service personnel to ensure the safety of
their customers, their machines as well as themselves during maintenance activities. Service personnel
are advised to read this booklet carefully to familiarize themselves with the warnings and precautions
described here before engaging in maintenance activities.
indicates that action is required. The specific action required is shown inside the symbol.
General action required.
Remove the power plug from the wall outlet.
Always ground the copier.
Safety warnings and precautions
Various symbols are used to protect our service personnel and customers from physical danger and
to prevent damage to their property. These symbols are described below:
DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect
compliance with warning messages using this symbol.
WARNING:Serious bodily injury or death may result from insufficient attention to or incorrect compliance
with warning messages using this symbol.
CAUTION:Bodily injury or damage to property may result from insufficient attention to or incorrect
compliance with warning messages using this symbol.
Symbols
The triangle ( ) symbol indicates a warning including danger and caution. The specific point
of attention is shown inside the symbol.
General warning.
Warning of risk of electric shock.
Warning of high temperature.
indicates a prohibited action. The specific prohibition is shown inside the symbol.
General prohibited action.
Disassembly prohibited.
1. Installation Precautions
WARNING
• Do not use a power supply with a voltage other than that specified. Avoid multiple connections to
one outlet: they may cause fire or electric shock. When using an extension cable, always check
that it is adequate for the rated current. ............................................................................................
• Connect the ground wire to a suitable grounding point. Not grounding the copier may cause fire or
electric shock. Connecting the earth wire to an object not approved for the purpose may cause
explosion or electric shock. Never connect the ground cable to any of the following: gas pipes,
lightning rods, ground cables for telephone lines and water pipes or faucets not approved by the
proper authorities. .............................................................................................................................
CAUTION:
• Do not place the copier on an infirm or angled surface: the copier may tip over, causing injury. .....
• Do not install the copier in a humid or dusty place. This may cause fire or electric shock. ..............
• Do not install the copier near a radiator, heater, other heat source or near flammable material.
This may cause fire. ..........................................................................................................................
• Allow sufficient space around the copier to allow the ventilation grills to keep the machine as cool
as possible. Insufficient ventilation may cause heat buildup and poor copying performance. ..........
• Always handle the machine by the correct locations when moving it. ..............................................
• Always use anti-toppling and locking devices on copiers so equipped. Failure to do this may
cause the copier to move unexpectedly or topple, leading to injury..................................................
• Avoid inhaling toner or developer excessively. Protect the eyes. If toner or developer is
accidentally ingested, drink a lot of water to dilute it in the stomach and obtain medical attention
immediately. If it gets into the eyes, rinse immediately with copious amounts of water and obtain
medical attention. ..............................................................................................................................
• Advice customers that they must always follow the safety warnings and precautions in the copier’s
instruction handbook. ........................................................................................................................
• Check that the power cable covering is free of damage. Check that the power plug is dust-free. If
it is dirty, clean it to remove the risk of fire or electric shock. ............................................................
• Never attempt to disassemble the optical unit in machines using lasers. Leaking laser light may
damage eyesight. ..............................................................................................................................
• Handle the charger sections with care. They are charged to high potentials and may cause
electric shock if handled improperly. .................................................................................................
CAUTION
• Wear safe clothing. If wearing loose clothing or accessories such as ties, make sure they are
safely secured so they will not be caught in rotating sections...........................................................
• Use utmost caution when working on a powered machine. Keep away from chains and belts. .......
• Handle the fixing section with care to avoid burns as it can be extremely hot. .................................
• Check that the fixing unit thermistor, heat and press rollers are clean. Dirt on them can cause
abnormally high temperatures...........................................................................................................
• Do not remove the ozone filter, if any, from the copier except for routine replacement. ...................
2. Precautions for Maintenance
WARNING
• Always remove the power plug from the wall outlet before starting machine disassembly...............
• Always follow the procedures for maintenance described in the service manual and other related
brochures. .........................................................................................................................................
• Under no circumstances attempt to bypass or disable safety features including safety
mechanisms and protective circuits. .................................................................................................
• Always use parts having the correct specifications. ..........................................................................
• Always use the thermostat or thermal fuse specified in the service manual or other related
brochure when replacing them. Using a piece of wire, for example, could lead to fire or other
serious accident. ...............................................................................................................................
• When the service manual or other serious brochure specifies a distance or gap for installation of a
part, always use the correct scale and measure carefully. ...............................................................
• Always check that the copier is correctly connected to an outlet with a ground connection. ............
• Do not pull on the AC power cord or connector wires on high-voltage components when removing
them; always hold the plug itself. ......................................................................................................
• Do not route the power cable where it may be stood on or trapped. If necessary, protect it with a
cable cover or other appropriate item. ..............................................................................................
• Treat the ends of the wire carefully when installing a new charger wire to avoid electric leaks........
• Remove toner completely from electronic components. ...................................................................
• Run wire harnesses carefully so that wires will not be trapped or damaged. ...................................
• After maintenance, always check that all the parts, screws, connectors and wires that were
removed, have been refitted correctly. Special attention should be paid to any forgotten
connector, trapped wire and missing screws. ..................................................................................
• Check that all the caution labels that should be present on the machine according to the
instruction handbook are clean and not peeling. Replace with new ones if necessary. ...................
• Handle greases and solvents with care by following the instructions below: ....................................
· Use only a small amount of solvent at a time, being careful not to spill. Wipe spills off completely.
· Ventilate the room well while using grease or solvents.
· Allow applied solvents to evaporate completely before refitting the covers or turning the main
switch on.
· Always wash hands afterwards.
• Never dispose of toner or toner bottles in fire. Toner may cause sparks when exposed directly to
fire in a furnace, etc...........................................................................................................................
• Should smoke be seen coming from the copier, remove the power plug from the wall outlet
immediately. ......................................................................................................................................
3. Miscellaneous
WARNING
• Never attempt to heat the drum or expose it to any organic solvents such as alcohol, other than
the specified refiner; it may generate toxic gas. ................................................................................
1-1-1
3HK
CONTENTS
1-1 Specifications
1-1-1 Specifications ....................................................................................................................................... 1-1-1
1-1-2 Parts names and their functions ........................................................................................................... 1-1-2
1-1-3 Machine cross section .......................................................................................................................... 1-1-3
1-1-4 Drive system ........................................................................................................................................ 1-1-4
1-2 Installation
1-2-1 Unpacking and installation ................................................................................................................... 1-2-1
1-3 Troubleshooting
1-3-1 Original misfeed detection .................................................................................................................... 1-3-1
(1) Original misfeed indication ............................................................................................................. 1-3-1
(2) Paper misfeed detection conditions ................................................................................................ 1-3-2
(3) Original misfeeds ............................................................................................................................ 1-3-3
1-3-2 Image formation problems ................................................................................................................... 1-3-4
1-3-3 Electrical problems ............................................................................................................................... 1-3-6
1-3-4 Mechanical problems ........................................................................................................................... 1-3-7
1-4 Assembly and Disassembly
1-4-1 Precautions for assembly and disassembly ......................................................................................... 1-4-1
(1) Precautions ..................................................................................................................................... 1-4-1
1-4-2 Assembly and disassembly .................................................................................................................. 1-4-2
(1) Detaching and refitting the original table, front cover, rear cover and DP original cover ................ 1-4-2
(2) Detaching and refitting the DP forwarding pulley and DP feed pulley ............................................ 1-4-3
(3) Detaching and refitting the DP conveying roller and DP eject roller ............................................... 1-4-5
1-4-3 Adjustment the maintenance mode ....................................................................................................... 1-4-7
(1) Adjusting the DP magnification ........................................................................................................ 1-4-7
(2) Adjusting the DP leading edge registration ..................................................................................... 1-4-8
(3) Adjusting the DP trailing edge registration ...................................................................................... 1-4-9
(4) Adjusting the DP center line .......................................................................................................... 1-4-10
(5) Adjusting the margins for scanning the original from the DP ......................................................... 1-4-11
2-1 Mechanical construction
2-1-1 Mechanical construction ....................................................................................................................... 2-1-1
(1) Original feed section ....................................................................................................................... 2-1-1
(2) Original feed timing ......................................................................................................................... 2-1-3
2-2 Electrical Parts Layout
2-2-1 Electrical parts layout ........................................................................................................................... 2-2-1
2-3 Operation of the PCBs
2-3-1 DP driver PCB ...................................................................................................................................... 2-3-1
2-4 Appendixes
Timing chart No. 1 .......................................................................................................................................... 2-4-1
Timing chart No. 2 .......................................................................................................................................... 2-4-2
Timing chart No. 3 .......................................................................................................................................... 2-4-3
Connection diagram ....................................................................................................................................... 2-4-4
3HK
1-1-1
1-1-1 Specifications
Original feed system ...................... Automatic feed
Originals ......................................... Sheets
Original weights.............................. 50 – 120 g/m2
Original sizes.................................. Folio – A5R/81/2" × 14" – 51/2" × 81/2"
No. of originals ............................... Up to 50 sheets (50 – 80 g/m2)
For art paper, set one sheet at a time.
Power source ................................. Electrically connected to the copier
Dimensions .................................... 455 (W) × 331 (D) × 93 (H) mm
1715/16" (W) × 131/16" (D) × 311/16" (H)
Weight ............................................ Approx. 2.3 kg/5.06 lbs
1-2-2
3HK
Procedure
1. Remove all of the components to the document
processor from the box.
CAUTION
Be sure to hold both sides of the document
processor when carrying it, as shown in the
illustration.
Be particularly careful NOT to touch the guide
film or the thin white surface indicated by the A
in the illustration.
2. Turn the main switch to the copier OFF (O).
3. Open the original cover and lift it upward to
remove it from the copier.
Figure 1-2-2
Figure 1-2-3
A
Document processor
Power switch
Oringinal holder
Figure 1-2-4
1-2-3
3HK
Figure 1-2-5
Figure 1-2-6
Figure 1-2-7
4. Attach the document processor to the copier.
CAUTION
Be sure that the connection cable does not get
caught between the document processor and the
copier when attaching the document processor to
the copier.
5. Gently close the document processor.
6. Attached the open end of the connection cable to
the connector on the copier.
Connection
cable
Document
processor
Connection cable
Document
processor
1-2-4
3HK
Figure 1-2-9
Figure 1-2-8
CAUTION
Be sure to tighten the pins securely when
connecting the cable.
7. Turn the main switch to the copier back ON ( | ).
Warm up will begin. “1” will appear on the
operation panel and the Start indicator will light
when the copier is in a copy-ready state.
Pins
Power switch
3HK
1-3-1
1-3-1 Original misfeed detection
(1) Original misfeed indication
When an original jams, the machine immediately stops operation and a message is shown on the copier operation panel.
To remove the jammed original, open the DP or the DP original cover. Also if the main switch on the copier is turned on with
an original set on the original table, the original jam display appears.
To reset the original misfeed detection, open and close the DP or DP original reversing cover to turn DP original detection
switch off and on.
DPTSW
DPODSW
Figure 1-3-1 Original misfeed detection
3HK
1-3-2
(2) Paper misfeed detection conditions
Section Jam code Description Conditions
DP 70
71
No original feed
An original jam in the
original conveying sec-
tion
When the main switch is turned on, the machine detects acti-
vation of the DP timing switch.
The machine cannot detect activation of the DP timing switch
even after 600 ms elapses since the start of primary paper
feed and cannot detect it at the same timing even after four
times of retry.
The machine cannot detect deactivation of the DP timing
switch even after 4100 ms elapses since the start of second-
ary paper feed.
3HK
1-3-3
Problem Causes/check procedures Corrective measures
(3) Original misfeeds
(1)
An original jams
when the main
switch is turned on.
(2)
An original jams in
the DP is indicated
during copying (no
original feed).
Jam code 70
(3)
An original jams in
the DP during copy-
ing (a jam in the
original conveying
section).
Jam code 71
(4)
Original jams fre-
quently.
A piece of paper torn from
an original is caught
around the DP timing
switch.
Defective DP timing
switch.
Defective DP timing
switch.
Check if the DP forwarding
pulley or DP feed pulley is
deformed.
Defective DP timing
switch.
Check if the DP conveying
roller or DP eject roller is
deformed.
An original outside the
specifications is used.
The DP forwarding pulley
or DP feed pulley is dirty
with paper powder.
The DP conveying roller
and DP conveying pulleys
do not contact correctly.
The DP eject roller and
eject pulley do not contact
correctly.
Remove any found.
Run maintenance item U244 and turn DP timing switch on and
off manually. Replace DP timing switch if indication of the corre-
sponding switch is not light.
Run maintenance item U244 and turn DP timing switch on and
off manually. Replace DP timing switch if indication of the corre-
sponding switch is not light.
Check visually and replace the deformed pulley.
Run maintenance item U244 and turn DP timing switch on and
off manually. Replace DP timing switch if indication of the corre-
sponding switch is not light.
Check visually and replace the deformed roller.
Use only originals conforming to the specifications.
Clean with isopropyl alcohol.
Check and remedy.
Check and remedy.
3HK
1-3-5
(2) There is a regular
error between the
leading edges of
the original and
copy image.
Causes
1. Misadjusted DP original scanning start
position.
Check procedures/corrective measures
Readjust the DP original scanning start position (see page 1-4-8).
Causes
1. Misadjusted DP original scanning start
position.
(1) There is a regular
error between the
centers of the
original and copy
image.
Causes
1. Misadjusted DP center line.
Check procedures/corrective measures
Readjust the DP center line (see page 1-4-10).
Causes
1. Misadjusted DP center line.
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